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which capacitors do I use? — Parallax Forums

which capacitors do I use?

evergreenevergreen Posts: 43
edited 2006-05-28 15:28 in General Discussion
Okay, I'm so confused as to which capacitors I need for this circuit.

#1
http://www.parallax.com/dl/docs/prod/boards/BS2CarrierBdSchem.pdf
Which 0.1 microfared capacitors should I get? There are so many types out there.

#2
For a simple R/C circuit on a barometric sensor (0-5v), which .01, 1, and .33 microfared capacitor should I get?

Thanks!

Comments

  • PJAllenPJAllen Banned Posts: 5,065
    edited 2006-05-27 21:06
    Regarding example #1: I figure, especially with a 0.1, that capacitance is capacitance, so a ceramic disc would be appropriate (a mylar, or any other sort should suffice.)· It's just by-passing, it's not a hi-freq tuned circuit.

    Regarding example #2: Don't know the application --·is tight tolerance required·or stability over temperature?· Either way, don't sweat the small-stuff. ·I think that, again, and not to be glib, that capacitance is capacitance.· Just get the values specified; run it up the flag-pole and see if anyone salutes.

    Nothing will get wrecked or hobbled in any event.· As a caveat, I would suggest you get capacitors rated at least 15-20V, as obtainable.
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2006-05-27 22:26
    The .1uF capacitors shown in that PDF are already on the board.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Chris Savage
    Parallax Tech Support
    csavage@parallax.com
  • evergreenevergreen Posts: 43
    edited 2006-05-28 15:28
    Okay thanks Allen and Chris!

    I'm building that circuit so I don't need the board. Hopefully it work!
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